Lithographic press.



Patented Nov. 2|, I899.

E. HETT.

LITHOGRAPHIC PRESS.

(Application filed June 13, 1898.)

2 Sheets$haet I.

(No Model.)

- AITORN EY S YHE uonms PETER co., mommaoummcrou. a. c.

No. 637,574. Patented Nov. 2|, I899. E. HETT.

LITHOGRAPHIC PRESS.

(Application filed June 18, 1898.)

2 Sheetg-Sheet 2,

(N0 ModeLf Illinmlillmm NITED STATES PATENT Orrrca EDWARD HETT, on NEWYORK, N. Y.

LlTHOGRAPHl C PRESS.

SPECIFICATION forming part of Letters Patent No. 637,574, dated November21, 1899. Application filed June 13,1898. Serial No. 688,352. (Nomodel.)

To all Mill/07711 it may concern.-

Be it known that I, EDWARD HETT, a citizen of the United States, and aresident of New York, (New Dorp,) in the county of Richmond, State ofNew York, have invented certain new and useful Improvements inLithographic Presses, of which the following is a specification.

My invention relates to lithographic or planographic presses, andparticularly to the damping mechanism for use in such presses.

It has for its main object to provide improved means for supplying waterin suitable quantities and at proper times and places tothedamping-rollers of alithographic orplanographic press, and especiallyto prevent an excessive supply of water to such rollers and to theprinting-cylinder.

It consists of the novel devices and combinations herein shown anddescribed.

In the operation of lithographic presses great difficulty has heretoforebeen encountered in avoiding an excess of water upon the damping-rollersand upon the printing-surface, especially where the printing-surface iscylindrical, and particularly so in multicolorpresses, wheredamping-rollers often lie directly above the paper web and where thereare a plurality of sets of printing-cylinders each relatively small ascompared with the drum or impression-cylinder and each with its set ofinking-rollers and damping-rollers with their connections, and where,owing to the necessarily small size and crowded and complicatedcharacter of the mechanism and to its consequent inaccessibility whenthe press is in operation, it is of the utmost importance that thedamping be automatic, exact, and certain in its operation without theneed of constant supervision. This difficulty has been due in greatmeasure to the lack of apositive feed to the dam ping-rollers of waterorother suitable dampening liquid and to improper or defectivedistribution of the water. It is of course essential inlithographicprinting presses that a sufficient supply of water befurnished to the damping-rollers and the printingcylinder and that suchwater be evenly and properly distributed. An excess of wateris, however,almost as injurious as a scarcity of Water. Where the wateris excessivein amount, it tends to form into drops or layers upon thedamping-rollers or printingsurface, to ruin the lithographic surface, toWork back upon the inking-rollers and mix with the ink, to interferewith the proper inking of the printing-cylinder, to fall in drops uponthe web, and generally to render the resulting product inferior orunmarketable.- I have found that by the use of one or more sprayingdevices from which a stream of fine spray or other suitable dampingliquid is continuously thrown and by the use of a fending vessel'whichis intermittently interposed between the spraying device and the dampingroller or rollers, so thata stream of fine spray is intermittentlythrown upon such roller or rollers, a sufficient amount of water can bepositively supplied to the damping-rollers in even and properdistribution for securing the best printing results Without anydeleterious excess of water, without the formation of drops orlayers,and without any injury whatever to the lithographic-printing surfaces orto the proper inking thereof or to the printed work itself. As thesupply of fine spray to the damping roller or rollers is intermittentand as those rollers are constantly moving, an excess of water upon anyportion of the rollers is prevented, while at the same time a sufiicientamount of water is furnished by a positive feed to the rollers and isproperly dis tributed, so as to meet all the requirements of goodlithographic printing. 1 have also found that such beneficial resultsare obtained to the best advantage by using as such spraying device oneor more atomizers, in which compressed air from a suitable source ofsupply is caused to blow across or around the mouth of a; tube leadingfrom any suitable source of supply of water or other damping liquid.

In two other applications executed simultaneously herewith anddesignated as Case A and Case B I have shown other forms of sprayingdevices arranged in other ways than those shown herein for accomplishingsubstantially the same result, this case being designated as Case C todistinguish it from said Case A and Case B.

In the drawings accompanying-this specification and forming part hereofand in which similar reference characters in the different figuresrepresent corresponding parts I have shown and will now proceed todescribe the I preferred form of my improved devices.

. tact with the printing-surface.

' press.

Figure 1 is a vertical cross-section through myimproved devices. Fig. 2is a vertical longitudinal section through-a part of the same on thelines 2 2 of Fig. 1 viewed as shown by the arrows. Figs. 3and 4 arevertical cross-sections through the air and water reservoirs. is a sideView, partly in section, of a part of a multicolor-press with the casingremoved, showing a number of printing-cylinders with their sets ofinking-rollers and damping-rollers and connections and the means forsupplying compressed air and water to the dif ferent sets of atomizers,the air and water supply'pipes being broken off, as shown, to enableother parts to be seen more clearly and the sets of damping-rollers andinking-rollers for one of the cylinders having their bearingboxesremoved to show the parts behind. Fig. dis a front view of the partsshown in Fig. 5.

y ,1 and 1 1 are damping-rollers of a lithographic press, 1 being thebrass roller commonlyemployed,constitutin g the distributingdamping-roller, and 1 l being the cloth-covcred rollers commonlyemployed to make con- The number and arrangement of thesedamping-rollers can be varied as desired. As shown in the drawings, theyare mounted upon swinging frames 2, one only of which is shown in thedrawings.

1 1 are printing-cylinders, and 1 is the drum or impression-cylinder ofa multicolor- (See Figs. 5 and 6.) I

3 3 are atomizers, of which I preferably employa series, although thenumber of atomizers can be varied to suit the requirements of the case,and, if desired, a single atomizer could be used. These atomizers aresecured to two cylindrical reservoirs-to wit, a waterreservoir 4 and anair-reservoir 5. Each a tomizer is composed of a central water-tube 6,which opens into the water-reservoir t at one end and opens at the otherend opposite the orifice 7 of the atomizer, and a surrounding tube 8,which at one end opens into the airres'ervoir 5 and at the other end hasan opening opposite the-orifice 7 of the atomizer. A cap 9 is preferablyscrewed upon the outer end of the air-tube 8, having at its outer pointthe orifice 7.

lOis a pipe having a valve operated by handle 11 for supplying water tothe water-reservoir 4. v

12 is a pipe having a valve operated by handle 13 for supplyingcompressed air to the airreservoir 5. I

In operation compressed air from the airreservoir flows across andaround the outward opening of the water-tube 6, thus drawingthe waterout of this tube and throwing it in the form of fine spray through theorifice of the atomizer. By this means and also by the pressure of thewater in the water-reservoir a positive feed of fine spray iscontinuously maintained through the orifices of the l Fig. 5'

reservoirs.

' press.

atomizers. In order to avoid an excessive amount of water upon thedamping-rollers, I

cause the feed or supply of fine spray to the damping-rollers to beintermittently interrupted by interposing between the orifice of theatomizer and the damping-roller a fend-v ing vessel for diverting atregular stated periods of time the stream of fine spray from therollers. Any fending vessel may housed and of any suitable form andshape that can be intermittently interposed between the atomizers andthe damping-rollers at-regular and stated periods. In the drawings Ihave shown-such a fending vessel as composed of a hollow, revolublecylinder 1&1, arranged in suitable bearings around the air and waterThis cylinder has an opening or slit 15, adapted in the oscillationofthe cylinder 14 to register'at regular and stated times with theorifices 7 of the atomizers. At such timesa stream of spray willbethrown upon the damping-rollers. When the cylinder-14 is partlyrevolved on its axis, the walls,

of the cylinder willinterpose between the orifices of the atomizers andthe damping-rollers, th'usfending the stream of fine spray from thoserollers. .A constant oscillating movement on its axis is given to thecylinder 14 through arm 16, pin 17, secured to the cylinder, arm 19, andfingers 18, arm 19 being secured to rocking shaft 20. Shaft 20 isoscillated in its bearings by any. suitable mechanism, preferably bymechanism connected. with the driving mechanism of the Fingers 18embrace pin 17 and as arm 19 oscillates through arm 16 it causes thefending-cylinder 14 to oscillate back and forth, causing fine spray tobe thrown intermittently upon the damping-rollers. Fig. 3shows the slitor opening 15 of the fending-cylinder registering with the orifices ofthe atomizers, and Fig. 4 shows the walls of the cylinder interposedbetween the atomizers and the damping-rollers. A pipe 21 leadsfrom thelower part of the fending-cylinder to permit the water dischargedagainst the walls of that cylinder to escape into a waste vessel 22,from which the water runs away through pipe 23.-

printing-cylinders 1 1 surrounding it, each with its set ofinking-rollers 24 and other inking mechanism and its set ofdampingrollers 1 1 1 With so many and such fine and complicated partscrowded closely together in acomparatively small space it is impossibleto show the mechanism in detail or even to show all of it in theseviews. They are intended merely to show the general arrangement ofmyimproved devices in a multicolor lithographic press and to show themeans for supplying compressed/amendwater or other suitable dampingliquid to the difier ent sets of atomizers and the means for positivelydriving the distributing damping-roll-.

ers 1'1.

24 is an air-supplypipe for supplying com pressed air to the differentair-reservoirs 5. It is connected with an air-p 11 mp (not shown) orwith any other suitable source of supply of compressed air. Branch pipes25, each provided with a cook 26, lead from air-supply pipe 24 and areprovided at their ends "with flexible hose connections 27, leading toair-pipe 12. The flexible hose permits the swingingactlon ot thedamping-frames 2 withoutinterrupting the flow of air. By the above meanscompressed air can be readily supplied in sufficient quantities to allthe air-reservoirs without interfering with the operation of the press.

28 is a water-supply pipe for supplying water or other suitable dampingliquid to the various water-reservoirs. It is similarly provided withbranch pipes 29, having cocks 30 and flexible hose 31, connecting withthe Various pipes 11. Pipe 28 is connected wit-h a pump (not shown) orwith any other suitable source of supply of water or other suitabledamping liquid. By the above means the various water-reservoirs arereadily and constantly supplied with damping liquid.

Each distributing damping-roller 1 is positively driven by the drivingmechanism of the press in the following manner: 32 is theink-distributing roller. It is driven by the driving mechanism of thepress in any suitable manner. Such driving mechanism is therefore notshown or described herein.

Spur-teeth 32 upon ink-distributing roller 33, through idle spur-wheel34, drive spu r-Wheel 35, loosely mounted upon the shaft of one of thecloth-covered damping-rollers 1 and the latter drives spur-wheel 36,rigidly secured to the shaft of distributing damping-roller 1, thusdriving the latter at any determinate rate of speed desired. Roller 1drives rollers 1 1 by friction in the usual way. By driving thedamping-rollers positively at a determinate rate of speed I have foundthat the amount of wateror other liquid best suited for lithographicwork can beobtained with greater accuracy and certainty than when therollers are driven by friction in the usual manner.

The means shown in Figs. 5 and 6 for rocking, shaft 20 are as follows:Upon shaft 20 is rigidly mounted the arm 37. Pivotally secured to thisis a rod 38, carrying a rolling pin 39, which moves in a cam-shaped slot40 in one of the ends of ink-distributing roller 33. Rod 38 is forked atits other end, the two forks 41 41 surrounding and supporting rod 38upon the end of the shaft of distributingroller 33. As roller 33rotates, the camshaped slot causes rod 38 to move backward and forward,thus imparting a rocking motion to shaft 20 and an oscillating movementto arm 19, and thence to fending-cylinder 14:. By means of my improvedspraying device in connection with means to cause an intermittentfending of the stream of spray from the damping-rollers, I am enabled tosupply to the damping-rollers with great certainty and exactness anamount or damping liquid suited to produce the best results inlithographic printing and to avoid both a scarcity and also an excess ofsuch liquid, and I am thus enabled to prevent the injurious results,referred to above, that flow from such an excess or a scarcity. Theintermittent character of the stream of fine spray that falls upon themoving damping-rollers prevents the formation of drops or layers or thedeposit of an excessive amount of liquid upon those rollers, whilefurnishing at the same time by a positive feed a sufficient amount ofliquid properly distributed to answer all the requirements of goodlithographic printing. It isparticularly efficient in producing suchresults when used in connection with dampingrollers driven positively bysuitable driving mechanism at a determinate rate of speed. By the use ofatomizers (the preferred form of my spraying device) the stream of sprayis finely comminuted and well distributed and can be readily andaccurately regulated.

As my improved devices are automatic and are accurate, reliable, andcertain in operation and need little supervision, they are of especialvalue in m ulticolor-presses where the parts of the mechanism arenumerous and complicated in character and small in size, where theprinting is rapidly performed, and where printing is taking placesimultaneously in many different places, so that constant supervisionand regulation of the action of the damping mechanism, so necessary inthe mechanism now employed in lithographic presses, cannot-bemaintained.

The term lithographic, as used in the specification and claims herein,is employed in its broad sense of planographic to include any printingby the lithographic process or any printing-surface adapted for printinglithographicall y whether such printing be done by, or suchprinting-surface be, stone, metal, or any other surface capable ofprinting by the lithographic process as distinguished from printing froman intaglio or raised surface, or whether such lithographicprintingsurface be flat or curved or cylindrical.

Various modifications may be made in the devices shown in the drawingshere described without departing from myinvention. Thus the sprayingdevices employed need not be atomizers, but may be any suitable meansfor sprayingliquid. The form and arrangement of the compressed air andwater reservoirs and their connections with the atomizers and the formand arrangement of fending vessel and means for oscillating it may bevaried as desired so long as a continuous feed of spray from theatomizers is intermittently interrupted by means of some interposing orfending body. The number of atomizers can be varied at will to suit therequirements of thecase. Thesupplyofwater neednotnecessarily be underpressure, although I prefer to have it under pressure, as a morepositive feed is thus secured. The opening in thelfendingvesselintervening between the atomfending vessel need not be aslit, but may. consist of numerous separate openings. Othermodifications than those referred to may also be made.-

Having' thus described my'invention, what I claim, and desire to secureby Letters Patent, is-- Y 1. In a lithographicpress, the'combination ofan, atomizer adapted to throw spray upon a damping-roller, awater-supply and a compressed-air supply communicating with theatomizer, a fending vessel intervening between the atomizer and thedamping-roller and having an opening in it and means for causing thedischarge-orifice of the atomizer and the opening of the fending vesselto register intermittently with each other, whereby spray will be thrownintermittently upon the damping-roller.

2. In a lithographic press, the combination.

" of an atomizer adapted to throw spray upon a damping-roller, awater-supply and a compressed-air supply communicating with theatomizer, an oscillating fending vessel intervening between the atomizerand the damping-roller and having an opening in it, and means foroscillating the fending vessel so as to cause the opening in the vesselto registerintermittently with the discharge-ori fice of the atomizer,whereby spray will be thrown intermittently upon the damping-roller.

3; In a lithographic press, the combination of an atomizer adapted tothrow spray upon a damping-roller, a water-reservoir and acompressed-air reservoir communicating with the atomizer, pipes forsupplying water and compressed air to said reservoir, an oscillatingfending vessel intervening between the atomizer and the damping rollerand having an opening in it, and means for oscillating the fendingvessel so as to cause the opening in the vessel to registerintermittently with the discharge-orifice of the atomizer, whereby spraywill be thrown intermittentlyupon the damping-roller.

4. In alithographic press, the combination of an atomizer adapted tothrow spray upon a damping-roller, awater-reservoir and a compressed-airreservoir communicating with the atomizer, pipes for supplying water andcompressed air to said reservoirs, an oscillating fending vesselintervening between the atomizer and the damping-roller and having anopening in it, an oscillating arm, actuated by the driving mechanism ofthe press and con-' nected to the oscillating fending vessel so as l tocause the opening in the vessel to register intermittently with thedischarge-orifice of the atomizer, whereby spray will be thrownintermittently upon the damping-roller.

5. In a lithographic press, the combination of an atomizer adapted tothrow spray upon a damping-roller, a water-reservoir and acompressed-airreservoir communicating with the atomizers, pipes for supplying waterand compressed air to said reservoirs, an oscillating izer andthe-dampingaroller and havingan opening init, an orifice in "the fendingvessel for discharging waste water, and means for oscillatingthelfendingvessel so as to cause the opening in the vessel to registerintermittently with the discharge-orifice of the atomizer, whereby spraywill be thrown intermittently upon the damping-roller.

6. In alit-hographic press, the combination of a series of atomizersadapted to throw spray upon a damping-roller, a water-supply and acompressed-air supply communicating with the atomizers, a fending vesselintervening between the atomizers and the dam ping-roller and havingaslit or openings in it and means for causing the discharge-orifices ofthe atomizers and the slit or openings of the fending vessel to registerintermittently with one another, whereby spray will be thrownintermittently upon the dampingroller.

7, In a lithographic press, the combination compressed-air supplycommunicating with the atomizers,an oscillating fending vesselintervening between the atomizers and the damping-roller and havingaslit oropenings in it, and means for oscillating the fending vessel soas to cause the slit or openings in the vessel to registerintermittently with the discharge-orifices of the atomizers, wherebyspray will be thrown intermittently upon the damping-roller.

8. In a lithographic press, the combination of a series of atomizersadapted to throw spray upon a damping roller, a water-reservoir'and acompressed-air reservoir communicating with the atomizers, pipes forsupplying water and compressed air to said reservoirs, an oscillatingfending vessel intervening between the atomizers and the damping-rollerand having a slit or openings in it, and means for oscillating thefending vessel so as to cause the slit or openings in the vessel toregister intermittently with the discharge-orifices of the atomizers,whereby spray will be thrown intermittently upon the damping-roller.

9. In a lithographic press, the combination of a series of atomizersadapted to throw spray upon a damping-roller, a water-reservoir and -acompressedrair reservoir communicating .with the atomizers, pipes forsupplying water and compressed air to said reservoirs, an oscillatingfending vessel intervening between the atomizers and the damping-rollerand having a slit or openings in it, an oscillating .arm, actuated bythedriving mechanism of the press and connected to the oscillatingfending vessel soas to causethe slit or openings in the vessel toregister intermittently with the discharge-orifices of the atomizers,whereby spray will be thrown intermittently upon the damping-roller.

10. Int lithographic press, the combination of a series of atomizersadapted to throw spray upon a damping-roller, a water-reser voir and acompressed-air reservoir communicating with the atomizers, pipes forsupplying water and compressed air to said reservoirs, an oscillatingfending vessel intervening between the atomizers and the damping-rollerand having a slit or openings in it, an orifice in the fending vesselfor discharging waste water, and means for oscillating the fendingvessel so as to cause the slit or openings in the vessel to registerintermittently with the discharge-orifices of the atomizers, wherebyspray will be thrown intermittently upgn the damping-roller.

11. The combination in alithographic press of a spraying device adaptedto throw spray upon a damping-roller, means for supplying said sprayingdevice with damping liquid, a fending vessel intervening between thespraying device and the damping-roller and having an opening in it andmeans for causing the discharge-orifice of the spraying device and theopening of the fending vessel to register intermittently with eachother,whereby spray will be thrown intermittently upon thedamping-roller.

12. The combination in a lithographic press, of a damping-roller, meansactuated by suit able driving mechanism for positively driving saidroller at a determinate rate of speed, a spraying device adapted tothrow spray for damping the roller, means for supplying the sprayingdevice with damping liquid, a fending vessel intervening between thespraying device and the damping-roller and having an opening in it, andmeans for causing the discharge-orifice of the spraying device and theopening of the fending vessel to register intermittently with eachother, whereby spray will be thrown intermittently upon the damping-roller.

13. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor,a series of damping mechanisms each including adistributing-roller, a spraying device adapted to throw spray upon thedamping-roller, a fending vessel intervening between the spraying deviceand thedampingroller, and having an openingin it, and means for causingthe discharge-orifice of the spraying device and the opening of thefending vessel to register intermittently with each other, and means forsupplying said spraying device with damping liquid whereby spray will bethrown intermittently upon the dam ping-roller,

14. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and'inking mechanismstherefor,a series of damping mechanisms each including adistributing-roller, a spraying device adapted to throw spray upon thedamping-roller, a fending vessel intervening between the spraying deviceand the dampingroller and having an opening in it, means for causing thedischarge-orifice of the spraying device and the opening of the fendingvessel to register intermittently with each other, means for supplyingsaid spraying device with damping liquid whereby spray will be thrownintermittently upon the damping-roller, and means for removing the wastewat-er.

15. In a multicolor lithographic press, the combination of animpression-drum, series of printing-cylinders and inking mechanismstherefor, a series of damping mechanisms, each including adistributing-roller,atomizers adapted to throw spray upon thedampingrollers, means for supplying the atomizers with damping liquidand compressed air',fending vessels intervening between the atomizersand the damping-rollers and having openings in them, and means forcausing the dischargeorifices of the atomizers and the openings of thefending vessels to register intermittently with each other,whereby spraywill be thrown intermittently upon the damping-rollers.

16, In a multicolor lithographic press, the combination of animpression-drum, series of printing-cylinders and inking mechanismstherefor, a series of damping mechanisms, each including adistributing-roller, atomizers adapted to throw spray upon thedampingrollers, means for supplying the atomizers with damping liquidand compressed air, oscillatin g fending vessels intervening between.the atomizers and the damping-rollers and having openings in them, andmeans for oscillating the fending vessels so as to cause by spray willbe thrown intermittently upon the damping-rollers.

17. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor,a series of damping mechanisms each including adistributingroller, atomizers adapted to throw spray upon thedampingrollers, water-reservoirs and compressed-air reservoirscommunicating with the atomizers, pipes for supplying water andcompressed air to said reservoirs, oscillating fending vesselsintervening between the atomizers and the damping-rollers and havingopenings in them, and means for oscillating the fending vessels actuatedby the driving mechanism of the press so as to cause the openings of thefending vessels to register intermittently with the discharge-orificesof the atomizers, whereby spray will be thrown intermittently upon thedamping-rollers, and pipes for removing the waste water.

18. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor,a series of damping mechanisms each including adistributing-roller, atomizers adapted to throw spray upon thedampingrollers, water-reservoirs and compressed-air reservoirscommunicating with the atomizers,

pipes for supplying water and compressed air to said reservoirs,oscillating fending vessels intervening between the atomizers and theIlO - roller and having'an openin'gin it, meansliior causing thedischarge-orifice of the sprayingdevice and theopening of the fendingvessel to register intermittently with each, other,

means for supplying said spraying device, with damping-liquid wherebyspray will be thrown intermittently upon the d 'a-mipi-ng 'v roller, andmeans for removing the waste damping-rollers andhav-ing openingsinfthem,a

orifices in the fending vessels for discharging means for sup plyingsaid spraying device with damping liquid whereby spray will be thrownwaste water, oscillating arm's actuated by the drivingmechanism of thepress; an'dflcon-- nect'ed'with the oscillating fending vesselsso as tocause the-openings in said vessels ,jto

register intermittently with the dischargeorifices of the atomizers,whereby spray wiill be thrown intermittently upon the dampingrollers,and pipes for conveying away the 'wastewater. g 19. In a multicolorlithographic press, the; combination of an impression-drum, a "series ofprinting-cylinders and inking mechanisms therefor, a series of dampin gmechanisms each including a distributing-roller, means actuated bysuitable driving mechanism for ,posi

tively driving the distributing rollersat a de terminate rate of speed,a spraying device adapted to throw spray upon the damping roller, afending vessel intervening between the spraying device and thedampingroller, and having an opening in it, and means for causing thedischarge-orifice of the spraying devicean d the opening of the'fend ingVessel to register intermittently, with each other, and

' intermittently upon the damping-roller.

20. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylindersand inkin'gm'echanisin'sc therefor, a series of damping mechanisms. each'including adistributing-roller, means 35 actuated by suitable driving mechanism forpositively driving the distributing-rollers at a determinaterate ofspeed, a spraying de vice adapted to throw spray uponthe d'amgping-roller, a fending vessel intervening between the spraying device and thedampingwa-ter. i

21. In a multicolor lithographicjpress, the combination of animpression-drum,- seriesiof printing-cylinders and inking mechanismstherefor, a series of damping mechanisms,

each including a distributing-roller, means actuated by suitable"driving mechanism for I I positively driving the distributing-roliersata determinate-rate of speed,atomizersadapted *to throw spray "upon thedamping rollers,

' means for supplying the atomizers withdamp- 6o l1 uid and compressedair, fending vesthem, and means for causing the dis'charg orifices ofthe v atomizers, and the openings: the, endingvessels to registerintermittent each-other, whereby spray wil ctervening between theatomizers and the "damping-rollers and having openings in eth'rown,ermittently upon-the dampingfrollers. I

22. In a multicolor lithographic press, the

"combination of an impression-drum, series of printing-cylinders andinking mechanisms therefor," 11 series of damping mechanisms, each'including a distributing-roller, means actuated by suitable drivingmechanism for positively "d rivin g the distributing-rollers atadetermina-te rate of speed, atomizer-s adapted tothrow spray upon thedamping-rollers,

means for supplying the 'atomizers with damp- 1 ing liquid andcompressed air, oscillating fendingvessels intervening between theatomizers and the dampingmolle-rs a'n'dhav ing openings in them, and meansfor oscillating the fending vessels-so as to cause their openings toregister intermittently withthe discharge orifices of the atomizers,wh'er'eby spray will be thrown intermittently uponthe damping-rollers. v

'23. In a multicolor lithographic press, the combination of animpression-drum, "a; series of p'r inting-cylinders-and inkingmechanisms there-for, a' series of damping mechanisms each including adistributing-roller, means actuated by suitable driving mechanism forpositively driving the distrib u ting-roller's at a determinate rate ofspeed, atomizersadapted to throw spray upon the dam ping-rollers,water-reservoirs and compressed-air reservoirs communicating with theatomizers, pipes forsupplyin g water and compressed air to sa'idreservoirs, oscillating fending vesselsinterven-ing between theatomizers and the dampingrrollersand havin g'openin gs in them, andmeans for oscillating the fending vessels actuatedbiy the drivingmechanism of the press so as :to cause theopenings' of the fendingvessels to registerintermittently with the 'dischargeeori' tices of the:atomizers, wherebyspray will be thrown intermittently npon thedamping-rollers, and .pipesfor removing the waste water.

1 24; In a multicolor lithographic press, the

combination 'of an impression-drum, a series of iprinting cylinders-andinking mechanisms therefonasories'ofdamping mechanisms'each including adistributing-roller, means actuated :suitabledriving mechanism forpositiv'elydriving' the distributing-rollers at adeter-minate' rate ofspeed, atomizer-s adaptedto th rewsprayupon the damping-rollers,waterreservoirs and icomipress'ed air reservoirs comm-un-icating withthe atomizers, pipes forsupplying water and compressed'a'ir to "saidreservoirs, oscillating fen'din g vessels intervening between theatomizer-s and the dampingrollers and having openings in them, orificesiin'jth'e-fending vessels for discharging waste wa'ter,- oscillatir1garms actuated by the enving mechanism of the press, and connected with{the oscillati ng fending vessels so as :to

*caus'e the'openings insaid vessels to register intermittently with thed-i-s'change oriiices*of the 'atomi'zers, w-herebyspray will "be. thrownintermittently upon the-dampingrollers, and. pipes fo -"conveyingaway'the waste .w'ater. a 11 's. multicol'or lithographic press, the

seas"?! Combination of an impression-drum, a series ofprinting-cylinders and inking mechanisms therefor,a series of dampingmechanisms each including a. distributing-roller, means actuated by thedriving mechanism of the press for positively driving thedistributing-rollers at a determinate rate of speed,a spraying deviceadapted to throw spray upon the damping-roller, a fending vesselintervening between the spraying device and the dampingroller and havingan opening in it, and means for causing the discharge-orifice of thespraying device and the opening of the fending vessel to registerintermittently with each other, and means for supplying said sprayingdevice with damping liquid whereby spray will be thrown intermittentlyupon the damping-roller.

'26. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor,a series of damping mechanisms each including adistributing-roller, means actuated by the driving mechanism of thepress for positively driving the distributing-rollers at a determinaterate of speed, a spraying device adapted to throw spray upon thedamping-roller, a fending vessel intervening between the spraying deviceand the dampingroller and having an opening in it, means for causing thedischarge-orifice of the spraying device and the opening of the fendingvessel to register intermittently with each other, means for supplyingsaidspraying device with damping liquid whereby spray will be thrownintermittently upon the damping-roller, and means for removing the wastewater.

27. In a multicolor lithographic press, the combination of animpression-drum, series of printing-cylinders and inking mechanismstherefor,a series of damping mechanisms,each

ing-rollers, means for supplying the atomizers with damping liquid andcompressed air, oscillating fending vessels intervening between theatomizers and the damping-rollers and having openings in them, and meansfor oscillating the fending vessels so as to cause their openings toregister intermittentlywith the discharge-orifices of the atomizers,whereby spray will be thrown intermittently upon the damping-rollers.

29. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor, a series of damping mechanisms each including adistributing-roller,means actuated by the driving mechanism of the pressfor positively driving the distributing-rollers at a determinate rate ofspeed, atomizers adapted to throw spray upon the damping-rollers,water-reservoirs and compressed air reservoirs communicating with theatomizers, pipes for supplying water and compressed air to saidreservoirs, oscillating fending vessels intervening between theatomizers and the damping-rollers and having openings in them, and meansfor oscillating the fending vessels actuated by the driving mechanism ofthe press so as to cause the openings of the fending vessels to registerintermittently with the discharge-orifices of the atomizers, wherebyspray will be thrown intermittently upon the damping-rollers, and pipesfor removing the waste water.

30. In a multicolor lithographic press, the combination of animpression-drum, a series of printing-cylinders and inking mechanismstherefor, a series of damping mechanisms each including adistributing-roller, means actuated by the driving mechanism of thepress for positively driving the distributingrollers at a determinaterate of speed, atomincluding a distributing-roller, means actuated bythe driving mechanism of the press for positively driving thedistributing-rollers at a determinate rate of speed, atomizers adaptedto throw spray upon the dampingrollers, means for supplying theatomizers with damping liquid and compressed air, fending vesselsintervening between the atomizers and the damping-rollers and havingopenings in them, and means for causing the discharge-orifices of theatomizers and the openings of the fending vessels to registerintermittentlywith each other,whereby spray will be thrownintermittently upon the damp ing-rollers.

28. In a multicolor lithographic press, the combination of animpression-drum, series of printing-cylinders and inking mechanismstherefor, a series of damping mechanisms, each including adistributing-roller, means actuated by the driving mechanism of thepress for positively driving the distributingrollers at a determinaterate of speed, atomizers adapted to throw spray upon the da mp izersadapted to throw spray upon the damping-rollers, water-reservoirs andcompressed- -air reservoirs communicating with the atomizers, pipes forsupplying water and compressed air to said reservoirs, oscillatingfending vessels intervening between the atomizers and thedamping-rollers and having openings in them, orifices in the fendingvessels for discharging waste water, oscillating arms actuated'by thedriving mechanism of the press, and connected with the oscillatingfending vessels so as to cause the openings in said vessels to registerintermittently with the discharge-orifices of the atomizers, wherebyspray will be thrown intermittently upon the damping-rollers, and pipesfor conveying away the waste water.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWARD HE'IT.

Witnesses:

